How to Turn Off Solar Inverter


For the safe operation of your solar panel, turning off solar inverters when not in use and regular maintenance are necessary indeed! 

A solar inverter is an essential component of a solar power system. It converts the direct current produced by the panels into alternating currents that can be used to light up our homes and run businesses. The article talks about how to turn off solar inverter and why you need to do so. Moreover, is it safe to turn it off? Let’s find out.

How To Turn Off Solar Inverter

To learn how to turn off solar inverter, the following steps should be followed:

Step 1

Start by checking the Solar PV system’s Single Line Diagram (SLD). SLD is an s a concise representation of the electrical connections between solar panels, inverters, combiner boxes, and main power switchboards.

Step 2

You now need to find the Solar AC Distribution Board. It is also known as a Solar AC Combiner Box in some regions. A circuit breaker and additional inverters are used to terminate the inverter’s AC output connection.

Usually, the SLD can pinpoint where the AC combiner box is located. Typically, you may find it in the building’s electrical room or in a location designated specifically for solar PV equipment.

Step 3

Once the AC Combiner Box is located, look for the breaker that you need to disconnect. The labeling inside the box will help you in this process. When you find the switch, flick the breaker to an OFF position. To be sure there is no power going to your inverter any longer, you should check it with a tester or multimeter.

Step 4

It’s time to move on to the actual inverter now that the AC side of the inverter has been turned off. The single-line diagram usually contains information about where it is located. The electrical room or the inverter room are possible locations for the inverter.

Step 5

After finding the solar inverter, verify whether a DC switch is connected to it or not. Most of the time, the inverter’s body contains the DC switch. Alternatively, depending on the number of string inputs linked to the inverter, you can also locate a separate DC isolator or isolator.

Your task is nearly over when you locate the DC switch or DC isolator and turn it to the off position. To turn the switch off, simply spin it to the left until you hear a click.

Step 6

Before you can confirm that the inverter has fully been turned off, you might need to wait a few seconds. Look for the indicators, which will indicate if the inverter is now off. Most inverters will include LED light indications or maybe a tiny screen where you can monitor its status. Verify that all displays and lights are off.

You can also take a look at our blog- How to Read Solar Inverter Display

Step 7

You can now begin performing the lock-out tag-out processes after you have validated and verified that the inverter is off. Additionally, putting up warning tags and signs will increase the operation’s safety and security.

Using the lockout, tag-out (LOTO) safety technique, make sure that dangerous machinery is completely turned off and cannot be restarted until maintenance or repair work has been finished. Before beginning work on the aforementioned equipment, dangerous energy sources must be – isolated and rendered inoperative.

Also See: How to Reset Inverter Fault?

Is It Safe To Turn Off Solar Inverter?

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There are times when the solar inverters are needed to be turned off. Understanding how to turn off solar inverter is very important. And yes, it is safe to turn off the solar inverter. The device doesn’t produce energy when it’s dark outside or when snow is covering the solar panels. In such a case, it is better to shut down the solar inverter. Another example can be during a power outage. In such as case, the solar inverter shuts down automatically due to no supply of electricity.

The inverter also shuts down when the voltage power is too high. Sometimes, the inverter displays a warning notice if the PV system fails. In this situation, you should check the display for an error notice and determine what kind of error it is by consulting the guide. You can rectify these mistakes yourself or take the help of an expert.

Cross-Reference: HUAWEI SUN2000- Power-OFF- User Manual

How to Turn On Solar Inverter

After purchasing a solar inverter, two important things to learn about are turning on the solar inverter and how to turn off solar inverter. Here, let’s learn about how to turn it on. The following steps are required to be followed in the same order.

Step 1 – Locate the Breaker Box. This should be in your garage connected to your main panel box. It is generally a grey-colored box. Once located, open the box, and look for PV Solar Breaker. This should be labeled with a red sticker and is typically at the top. If the PV Solar Breaker is turned off, flip the switch to turn it on.

Step 2 – Search for your AC Disconnect box. It should be a small grey metal box with a handle to the side, labeled with two red stickers, AC Disconnect, and Photovoltaic System AC Disconnect. It would be next to the Photovoltaic System Meter. Once you find the box, lift the handle up and turn it on.

Step 3 – For SolarEdge solar inverter, look for a small white box marked SolarEdge. You will see a black circular switch on the inverter. Turn it clockwise to the ON position. Next, you must search for a small red button. Once located, turn it to 1, which means the inverter is ON. Wait for a while. Once all the steps are completed, the inverter will show green or green and blue lights.

This is how you can turn the inverter on. However, you can also use a generator and switch it on.

In What Situation do You Need to Switch Off Solar Inverter?

There are several situations when you will need to switch off your solar inverter.

1. Maintenance

If you need to perform maintenance or repair work on your solar system, you should turn off the inverter to ensure your safety.

2. Emergency

In the event of an emergency such as a fire or flood, it may be necessary to turn off the inverter to prevent any further damage or danger.

3. Power Outage

If there is a power outage in your area, you should turn off your solar inverter to avoid feeding electricity back into the grid, which can be dangerous for utility workers who are trying to repair the power lines.

4. Excessive Heat

If the inverter is overheating due to excessive ambient temperatures or lack of ventilation, it may be necessary to turn it off to prevent damage to the equipment.

5. System Shutdown

If you need to shut down your entire solar system, you should turn off the inverter first to ensure that no electricity is being generated or fed back into the grid.

Also Read: 8 Reasons Inverter Keeps Switching On and Off

How to Avoid those Situations?

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After understanding how to turn off solar inverter, let us see how to avoid those situations where you would need to turn it off.

1. By conducting regular maintenance checks, you can help ensure that your solar system and inverter are functioning properly and avoid unexpected shutdowns.

2. Ensure that your solar inverter is properly installed and in a location that is well-ventilated to help prevent overheating.

3. Use surge protectors to protect your solar inverter from power surges caused by lightning or other electrical events.

4. Install a battery backup system to keep your solar system running even during a power outage, which can help avoid the need to turn off the inverter.

5. Use a monitoring system to keep track of your solar system’s performance and identify any issues that may arise, which can help you address them before they lead to a shutdown.

There may still be situations in which it’s necessary to turn off a solar inverter for safety or maintenance reasons, but following these steps can help reduce the likelihood of needing to do so.

Increasing awareness about renewable sources of energy has pushed people to invest in solar power systems. Once installed it is important to learn how to turn the solar inverter on and off. This will help in increasing the product life and efficiency. I hope this blog has helped you in some way. Keep track of our page for more such content.

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